1
- Mathematics a heart-shaped curve traced by a point on the circumference of a circle as it rolls around another identical circle【数】心脏线。
1.1
- （亦作cardioid microphone）a directional microphone with a pattern of sensitivity of this shape心脏形传声器。
- of the shape of a cardioid具心脏形状的。
词源
mid 18th cent.: from Greek kardioeidēs 'heart-shaped', from kardia 'heart' + eidos 'form'.